| Bt杀虫蛋白对棉铃虫的抗虫毒力和增效作用 |
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| 引用本文： | 范贤林,赵建周,芮昌辉,谢天健.Bt杀虫蛋白对棉铃虫的抗虫毒力和增效作用[J].农药学学报,1999,1(3):51-55. |
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| 作者姓名： | 范贤林 赵建周 芮昌辉 谢天健 |
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| 作者单位： | 1.中国农业科学院植物保护研究所,北京100094 |
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| 基金项目： | 国家自然科学基金! (No.3950 0 10 0 )资助课题 |
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| 摘 要： | 用 Bt杀虫蛋白 (ICP) Cry1A汰选的棉铃虫 (H elicoverpa armigera)抗性种群和同源对照种群分别测定了 4种不同类型 Bt ICP的抗虫毒力。结果表明 :4种杀虫蛋白对对照种群的毒力顺序为 :Cry1Ac>Cry1Ac+ 1C>Cry2 A>Cry1C;对抗性种群的毒力顺序为 :Cry1Ac+ 1C>Cry1Ac>Cry2 A>Cry1C,其中Cry1Ac+ 1C表现出对抗性种群有显著的协同增效作用。采用从 Bt液体发酵上清液中提取的增效粉 ,与Cry1Ac以 1∶ 1和 1∶ 2的比例混合 ,对 Cry1Ac有显著的增效作用 ,用抗性种群测定的增效比值明显大于对照种群 ,处理 5d的增效比值大于 14d的
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| 关 键 词： | 苏云金杆菌 杀虫蛋白 棉铃虫 抗虫毒力 增效作用 |
SYNERGISM AND TOXICITY OF INSECTICIDAL PROTEINS FROM BACILLUS THURINGIENSIS TO THE COTTON BOLLWORM |
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| Fan Xian-lin,Zhao Jian-zhou,Rui Chang-hui and Xie Tian-jian.SYNERGISM AND TOXICITY OF INSECTICIDAL PROTEINS FROM BACILLUS THURINGIENSIS TO THE COTTON BOLLWORM[J].Chinese Journal of Pesticide Science,1999,1(3):51-55. |
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| Authors: | Fan Xian-lin Zhao Jian-zhou Rui Chang-hui and Xie Tian-jian |
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| Institution: | 1.Institute of Plant Protection2.Chinese Academy of Agricultural Sciences |
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| Abstract: | Toxicity of 4 kinds of insecticidal crystal protein (ICP) from Bacillus thuringiensis (Bt) to Cry1Ac-resistant (R) and the homologous susceptible (S) strains of cotton bollworm, Helicoverpa armigera Hübner was evaluated. The sequence of toxicity of the 4 Bt ICP is as follows: Cry1Ac>Cry1Ac+1C>Cry2A>Cry1C to S strain, and Cry1Ac+1C>Cry1Ac>Cry2A>Cry1C to R strain. Significant synergism was found while appling Cry1c and Cry1c together to the R strain. At 1∶1 and 1∶2 proportions of the synergist and Cry1Ac notable synergism was observed. The synergism after 5 days treatment was higher than that after 14 days treatment, and was higher in the R strain than in the S strain. |
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| Keywords: | Bacillus thuringiensis Helicoverpa armigera Toxicity Synergism |
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